Keying, Tint – Adobe Premiere Elements 12 User Manual
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Note:
Ignore Alpha
Invert Alpha
Mask Only
Gamma Correction
The Gamma Correction effect lightens or darkens a clip without substantially changing the shadows and highlights. It does this by changing the
brightness levels of the midtones (the middle-gray levels), while leaving the dark and light areas unaffected. The default gamma setting is 7. You
can adjust the gamma from 1 to 28.
Tint
The Tint effect alters a clip’s color information. For each pixel, the luminance value specifies a blend between two colors. Map Black To and Map
White To specify to which colors dark and bright pixels are mapped. Intermediate pixels are assigned intermediate values. Amount To Tint
specifies the intensity of the effect.
Keying
For information on using keying effects to create transparency, see Superimposing and transparency.
Alpha Adjust
Use the Alpha Adjust effect in place of the Opacity effect when you need to change the default render order of fixed effects. Change the opacity
percentage to create levels of transparency. The following controls allow you to interpret the alpha channel in the clip.
This effect ignores or inverts the alpha channel of only a single instance of a clip. To adjust the alpha channel of every instance of the clip,
you need to use the Interpret Footage command.
Ignores the alpha channel of the clip.
Reverses the transparency and opaque areas of the clip.
Displays only the alpha channel.
Alpha Adjust
A. Clip with alpha channel B. Ignore Alpha C. Invert Alpha D. Mask Only
Blue Screen Key and Green Screen Key (Windows only)
The Blue Screen Key effect and the Green Screen Key effect create a keyhole of all clip pixels that are similar to a standard blue screen or green
screen, so that they become transparent. This effect is typically used to replace a blue or green background with another clip, as in replacing a
blue screen behind a TV weatherman with a weather map.
Effective use of the Blue Screen Key or the Green Screen Key requires footage where the background is a bright, evenly-lit standard blue or
green screen. Make sure that persons or objects you place in front of the backdrop don’t match the color of the backdrop (unless they have areas
that you also want to make transparent). For footage with a single-color background that doesn’t match these requirements, try Chroma Key or the
Videomerge effect.
You can adjust the following settings in the Applied Effects panel:
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